Angle Measuring Or Angular Axial Alignment Patents (Class 356/138)
- With photodetection of reflected beam angle with respect to a unidirectional source beam (Class 356/141.1)
- With photodetection (Class 356/141.2)
- Scale and remote point simultaneously observable (Class 356/142)
- With plural images (Class 356/144)
- Measurement in two planes (e.g., azimuth and elevation; hour angle and declination) (Class 356/147)
- Artificial reference (Class 356/148)